#ifndef head_h
#define head_h

#include "reg52.h"

typedef unsigned int u16;
typedef unsigned char u8;

sbit negtive4=P1^3;
sbit negtive3=P1^2;
sbit negtive2=P1^1;
sbit negtive1=P1^0;

void delay_time(u16 ten_us);
void delay_ms(u16 ms);

#endif